Once you are satisfied you got the correct replacement then you can use that link to get the correct main board or part number for your main board .

That link is the most complete site for the various parts available for this model so you can match yours there before doing any more buying .

If you need help with this then let me know but to answer your question , if you got the correct t-con and it is installed correctly (double check your install) then the main board is the problem .

If that answers your question please do not forget to rate by clicking on the 5-star icon at the top, then click on Submit so i get paid for my time helping you .Also note that it will not close this post , you can come back here at any time if you have questions. Thank you